Wideband Frequency Reconfigurable Patch Antenna for Various Wireless Applications

A patch antenna capable of wideband frequency reconfiguration is presented with planar structure and simple configuration in this study. The antenna has a rectangular shaped partial ground plane, two p-i-n diodes (for switching purpose) with its controlling circuit, two radiating elements, and microstrip feed line. The radiator which has smaller length, is responsible for operating at higher frequency (covers WLAN band) and the larger radiating element resonates at lower frequency range (covers Bluetooth and WiMAX band). At a time, one radiating element will be connected with the feed line and this mechanism is controlled by the ON - OFF condition of those p-i-n didoes. By considering the wideband reconfigurable frequency response and simplicity in structural design, this proposed antenna can fulfil the demand of various application area of wireless communication.